//---------------------------------------------------------------------------- // Anti-Grain Geometry - Version 2.2 // Copyright (C) 2002-2004 Maxim Shemanarev (http://www.antigrain.com) // // Permission to copy, use, modify, sell and distribute this software // is granted provided this copyright notice appears in all copies. // This software is provided "as is" without express or implied // warranty, and with no claim as to its suitability for any purpose. // //---------------------------------------------------------------------------- // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://www.antigrain.com //---------------------------------------------------------------------------- #ifndef AGG_PIXFMT_RGB24_PRE_INCLUDED #define AGG_PIXFMT_RGB24_PRE_INCLUDED #include #include "agg_basics.h" #include "agg_color_rgba8.h" #include "agg_rendering_buffer.h" namespace agg { //==================================================pixel_formats_rgb24_pre template class pixel_formats_rgb24_pre { public: typedef rgba8 color_type; private: //-------------------------------------------------------------------- static inline void copy_pix(int8u* p, const color_type& c) { p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; } //-------------------------------------------------------------------- static inline void blend_pix(int8u* p, const color_type& c, unsigned cover, unsigned alpha) { p[Order::R] = (int8u)((p[Order::R] * alpha + ((c.r * cover) << 8)) >> 16); p[Order::G] = (int8u)((p[Order::G] * alpha + ((c.g * cover) << 8)) >> 16); p[Order::B] = (int8u)((p[Order::B] * alpha + ((c.b * cover) << 8)) >> 16); } //-------------------------------------------------------------------- static inline void copy_or_blend_pix(int8u* p, const color_type& c, unsigned cover) { unsigned alpha = 65535 - cover * c.a; if(alpha < 65535) { if(alpha <= 65535-255*255) { copy_pix(p, c); } else { blend_pix(p, c, cover, alpha); } } } //-------------------------------------------------------------------- static inline void copy_or_blend_pix(int8u* p, const color_type& c) { unsigned alpha = 255 - c.a; if(alpha < 255) { if(alpha == 0) { copy_pix(p, c); } else { p[Order::R] = (int8u)((p[Order::R] * alpha + (c.r << 8)) >> 8); p[Order::G] = (int8u)((p[Order::G] * alpha + (c.g << 8)) >> 8); p[Order::B] = (int8u)((p[Order::B] * alpha + (c.b << 8)) >> 8); } } } public: //-------------------------------------------------------------------- pixel_formats_rgb24_pre(rendering_buffer& rb) : m_rbuf(&rb) { } //-------------------------------------------------------------------- unsigned width() const { return m_rbuf->width(); } unsigned height() const { return m_rbuf->height(); } //-------------------------------------------------------------------- color_type pixel(int x, int y) { int8u* p = m_rbuf->row(y) + x + x + x; return color_type(p[Order::R], p[Order::G], p[Order::B]); } //-------------------------------------------------------------------- void copy_pixel(int x, int y, const color_type& c) { int8u* p = m_rbuf->row(y) + x + x + x; p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; } //-------------------------------------------------------------------- void blend_pixel(int x, int y, const color_type& c, int8u cover) { copy_or_blend_pix(m_rbuf->row(y) + x + x + x, c, cover); } //-------------------------------------------------------------------- void copy_hline(int x, int y, unsigned len, const color_type& c) { int8u* p = m_rbuf->row(y) + x + x + x; do { p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; p += 3; } while(--len); } //-------------------------------------------------------------------- void copy_vline(int x, int y, unsigned len, const color_type& c) { int8u* p = m_rbuf->row(y) + x + x + x; do { p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; p += m_rbuf->stride(); } while(--len); } //-------------------------------------------------------------------- void blend_hline(int x, int y, unsigned len, const color_type& c, int8u cover) { int8u* p = m_rbuf->row(y) + x + x + x; unsigned alpha = unsigned(cover) * c.a; if(alpha == 255*255) { do { p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; p += 3; } while(--len); } else { alpha = 65535 - alpha; do { blend_pix(p, c, cover, alpha); p += 3; } while(--len); } } //-------------------------------------------------------------------- void blend_vline(int x, int y, unsigned len, const color_type& c, int8u cover) { int8u* p = m_rbuf->row(y) + x + x + x; unsigned alpha = unsigned(cover) * c.a; if(alpha == 255*255) { do { p[Order::R] = (int8u)c.r; p[Order::G] = (int8u)c.g; p[Order::B] = (int8u)c.b; p += m_rbuf->stride(); } while(--len); } else { alpha = 65535 - alpha; do { blend_pix(p, c, cover, alpha); p += m_rbuf->stride(); } while(--len); } } //-------------------------------------------------------------------- void copy_from(const rendering_buffer& from, int xdst, int ydst, int xsrc, int ysrc, unsigned len) { memmove(m_rbuf->row(ydst) + xdst * 3, (const void*)(from.row(ysrc) + xsrc * 3), len * 3); } //-------------------------------------------------------------------- void blend_solid_hspan(int x, int y, unsigned len, const color_type& c, const int8u* covers) { int8u* p = m_rbuf->row(y) + x + x + x; do { copy_or_blend_pix(p, c, *covers++); p += 3; } while(--len); } //-------------------------------------------------------------------- void blend_solid_vspan(int x, int y, unsigned len, const color_type& c, const int8u* covers) { int8u* p = m_rbuf->row(y) + x + x + x; do { copy_or_blend_pix(p, c, *covers++); p += m_rbuf->stride(); } while(--len); } //-------------------------------------------------------------------- void blend_color_hspan(int x, int y, unsigned len, const color_type* colors, const int8u* covers, int8u cover) { int8u* p = m_rbuf->row(y) + x + x + x; do { copy_or_blend_pix(p, *colors++, covers ? *covers++ : cover); p += 3; } while(--len); } //-------------------------------------------------------------------- void blend_color_vspan(int x, int y, unsigned len, const color_type* colors, const int8u* covers, int8u cover) { int8u* p = m_rbuf->row(y) + x + x + x; do { copy_or_blend_pix(p, *colors++, covers ? *covers++ : cover); p += m_rbuf->stride(); } while(--len); } private: rendering_buffer* m_rbuf; }; typedef pixel_formats_rgb24_pre pixfmt_rgb24_pre; //----pixfmt_rgb24_pre typedef pixel_formats_rgb24_pre pixfmt_bgr24_pre; //----pixfmt_bgr24_pre } #endif